Safety lock for automobiles



Oct. 30, 1956 G. J. WASSERMAN SAFETY LOOK FOR AUTOMOBILES Filed June 29, 1953 EEEEEEEEW iiiiifiiai v A BEE-5am United States Patent SAFETY LOCK FOR AUTOMOBILES George J. Wasserman, Boston, Mass.

Application June 29, 1953, Serial No. 364,624

2 Claims. (Cl. 292-647) The invention relates to an improvement in the present widely utilized push button system for locking the doors of automobiles and has as its major objective a foolproof method of preventing children from inadvertently or malevolently gaining egress from the automobile. It is also the inventors intent to relieve the operator of the vehicle from this added mental burden so as to allow full concentration on his driving responsibilities.

This invention is embodied in Figure 1 and Figure 2 in vertical section view-s. Figure 1 shows the normal locked operating position of the lock. Figure 2 shows the device in a safety lock position.

In Figure 1, knob 1, internally threaded, is screwed onto an externally threaded shaft 4 which is in a depressed position as in a normally locked car. The threaded shaft 4 and the knob I extend through an aperture in a conventional automobile window sill 6. A fric tion-type washer 2 rests on shoulder 3 of said knob.

Figure 2 portrays the assembled parts previously referred to with shaft 4 in a depressed normally locked position and k-nob 1 screwed counterclockwise to safety lock position with friction-type washer 2 tightly secured against the flaring of the aperture 5 of the window sill 6.

Patented Oct. 30, 1956 A space between the shaft head and the top inside of the forementioned knob 1 is indicated by 7 in the drawing.

The foregoing invention can be manufactured with a minimum of expense, requires little mechanical skill or knowledge in operating and would be wholly independent of and optional to the normal functions of the look when the need for added safety is not present.

I claim:

1. In combination with an automobile door lock of the type having a pin extending through an opening in the sill adapted to be pushed down to lock the door, a sleeve threaded over said pin and also extending through said opening, said sleeve having a shoulder larger than said opening normal to the sleeve positioned under the sill whereby when said sleeve is pushed down with said pin, the sleeve may be turned upwards until the shoulder engages the underside of the sill.

2. In combination with an automobile door lock of the type having a pin extending through an opening in the sill adapted to be pushed down to lock the door, a sleeve threaded over said pin, also extending through said opening in said sill, means larger than said opening attached to said sleeve under the sill limiting the motion of the said pin in an upwardly direction, whereby the sleeve may be turned upwards after the pin has been pressed down to prevent said pin from being pulled upwards to unlock the door.

References Cited in the file of this patent UNITED STATES PATENTS D. 168,424 Schumann Dec. 16, 1952 D. 168,425 Schumann Dec. 16, 1952 1,891,685 Nicks et al. Dec. 20, 1932. 2,582,237 Dall Jan. 15, 1952 2.629.246 Schumann Feb. 24, 1 53 

